A cylindrical dispenser of capacity 5.3 ℓ was filled with dragonfruit juice to its brim. The dragonfruit juice in the dispenser was then dispensed into a cubical container of sides 20 cm, through a tap flowing at a rate of 472 mℓ /min. After 10 min, the tap was turned off and the container was
34 full.
- What percentage of the dragonfruit juice in the cylindrical dispenser was left? Round off your answer to the nearest 2 decimal places.
- How many litres of dragonfruit juice were there in the container at first? (1 ℓ = 1000 cm3)
(a)
Volume of dragonfruit juice that was dispensed
= 472 x 10
= 4720 mℓ
1 ℓ = 1000 mℓ
4.72 ℓ = 4720 mℓ
Volume of dragonfruit juice Left in the dispenser
= 5.3 - 4.72
= 0.58 ℓ
Percentage of dragonfruit juice Left in the dispenser
= 0.58 ÷ 5.3 x 100
= 10.943396226415%
≈ 10.94% (to 2 decimal places)
(b)
Amount of dragonfruit juice in the container in the end
= 34 x 20 x 20 x 20 = 6000 cm
3
Amount of dragonfruit juice in the container at first
= 6000 - 4720
= 1280 cm
3 1000 cm³ = 1 ℓ
1280 cm
3 = 1.28 ℓ
Answer(s): (a) 10.94%; (b) 1.28 ℓ